A Potential

1. Currently unrealized ability (with the most common adposition being to)

2. (physics) The gravitational potential: the radial (irrotational, static) component of a gravitational field, also known as the Newtonian potential or the gravitoelectric field.
3. (physics) The work (energy) required to move a reference particle from a reference location to a specified location in the presence of a force field, for example to bring a unit positive electric charge from an infinite distance to a specified point against an electric field.
4. (grammar) A verbal construction or form stating something is possible or probable.

noumenon

spirit

matter

phenomenon